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Fiscal BrasilCAUTION

mcp/dehor-labs/fiscal-brasil-1
MCP server by dehor-labs · accounting · ai · brasil · Audited 2026-10-07
⚑ Report / re-scanSource ↗

Servidor MCP fiscal brasileiro: CNPJ, NF-e, NFS-e, CT-e, SPED, eSocial, Simples Nacional, Reforma 2026. 44 tools, zero-cadastro, tabelas offline. Python.

Verdict
CAUTION
Grade
B
Trust score
87 /100
Exposed tools
—
Transport
stdio · streamable-http
License
MIT
Stars
315
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

O único servidor MCP com suporte nativo a NF-e, NFS-e, SPED, eSocial, Simples Nacional e Reforma Tributária 2026 (IBS/CBS) - sem conta, sem chave e sem configuração.

📚 Documentação · Instalação · Ferramentas · Wo

Read from source at commit b5f42966e0f4OBSERVED · 2026-10-07
02

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.

claude-code (pypi)
claude mcp add mcp-fiscal-brasil -- uvx mcp-fiscal-brasil==0.5.1
03

Trust audit

CAUTIONgrade B · trust 87/100 Install with care. The audit found things worth knowing before you trust its output.

LayerWhat it checksResult
L0Provenance & inventoryWARN
L1Static analysis of the codeWARN
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
none-observed
Network
declared (7 observation(s))
Shell
none-observed
Dependencies
not all pinned
Secrets in source
none-found

Findings (17)

MEDIUMInventory / provenance · inv.binary · CWE-1104
src/mcp_fiscal_brasil/tabelas/data/tabelas_fiscais.db
tabelas_fiscais.db
Why it matters. a compiled or binary member cannot be reviewed from source
Fix. ship source, or explain the binary in the README
MEDIUMNetwork egress · net.beacon_words · CWE-200, CWE-319
.coderabbit.yaml:40
exfiltrar dados ou executar ações não autorizadas.
MEDIUMNetwork egress · net.raw_ip · CWE-200, CWE-319
scripts/docker_healthcheck.py:37
f"http://127.0.0.1:{PORT}/health", timeout=_TIMEOUT_SECONDS
LOWInventory / provenance · inv.hidden_file · CWE-1104
.coderabbit.yaml
.coderabbit.yaml
Why it matters. hidden member outside the usual dotfiles
Fix. review its purpose
LOWInventory / provenance · inv.hidden_file · CWE-1104
.pre-commit-config.yaml
.pre-commit-config.yaml
Why it matters. hidden member outside the usual dotfiles
Fix. review its purpose
LOWInventory / provenance · inv.hidden_file · CWE-1104
.release-please-manifest.json
.release-please-manifest.json
Why it matters. hidden member outside the usual dotfiles
Fix. review its purpose
LOWFilesystem / path · fs.traversal · CWE-22, CWE-59
.github/workflows/welcome.yml:28
Tem uma duvida ou sugestao mais aberta? Use o [Discussions](../../discussions) do projeto.
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
src/mcp_fiscal_brasil/nfe/assinatura.py:69
der_bytes = base64.b64decode(str(x509_nodes[0]).strip())
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
src/mcp_fiscal_brasil/nfe/distribuicao.py:229
compressed = base64.b64decode(doc_zip_b64.strip())
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
tests/test_nfe_danfe.py:287
pdf_bytes = base64.b64decode(resultado.pdf_base64)
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
tests/test_nfe_danfe.py:306
pdf_bytes = base64.b64decode(resultado.pdf_base64)
LOWObfuscation / stealth · obf.decode_call · CWE-506, CWE-94
tests/test_nfe_danfe.py:338
pdf_bytes = base64.b64decode(resultado.pdf_base64)
LOWSupply chain · supply.unpinned · CWE-829, CWE-1357
npm-wrapper/package.json
@types/node, typescript
Why it matters. 2 dependency range(s) float
Fix. pin exact versions or ship a lockfile
LOWInventory / provenance · mcp.no_tools_extracted · CWE-1104
server.json
Why it matters. the tool list is enumerated at runtime by tools/list, not declared in source
Fix. the page says so rather than showing an empty table
INFOSupply chain · prompt.pipe_to_shell · CWE-829, CWE-1357
README.md:354
> **O que é `uvx`?** É o gerenciador de ferramentas do [uv](https://docs.astral.sh/uv/), que baixa e executa pacotes Python em ambiente isolado, sem poluir seu sistema. Se ainda não tem o uv: `curl -L
INFOSupply chain · prompt.pipe_to_shell · CWE-829, CWE-1357
docs/contributing.md:19
curl -LsSf https://astral.sh/uv/install.sh | sh
INFOSupply chain · prompt.pipe_to_shell · CWE-829, CWE-1357
docs/getting-started/deploy.md:31
brew install flyctl  # ou: curl -L https://fly.io/install.sh | sh

Gates applied: no_behavioural_pass.

Audited 2026-10-07 · audit v0.4.1 · source sha b5f42966e0f4full audit observations/trust-audit/mcp-server/dehor-labs__fiscal-brasil-1.json · Report an issue / request a re-scan
04

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-07b5f42966e0f4CAUTIONB87first audit
05

Questions

What is the Fiscal Brasil MCP server?

Servidor MCP fiscal brasileiro: CNPJ, NF-e, NFS-e, CT-e, SPED, eSocial, Simples Nacional, Reforma 2026. 44 tools, zero-cadastro, tabelas offline. Python.

Is Fiscal Brasil safe to connect to an agent?

With care. The audit graded it B (87/100) and found 17 things worth knowing before you trust this server, listed below with the exact line each was found on.

What credentials does Fiscal Brasil need?

No credential environment variables were found in its source, so it appears to need none.

How does Fiscal Brasil run?

It speaks stdio and streamable-http, so it runs as a local process your client starts. It is published on npm as mcp-fiscal-brasil at 0.5.1.

How current is this page?

The grade is for one exact copy of the source (b5f42966e0f4), read on 2026-10-07. The repository is watched and re-audited when it changes.

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